Can heat, sun or a vacation cause fever, vomiting or diarrhea in a child?
Applies to age: 0–36 months
In short
Yes, overheating (heat exhaustion) can cause vomiting and a high temperature. Heatstroke, with signs such as hot skin without sweating, is an emergency; an ambulance is called for heatstroke.
What is normal
All claims: international norm
- Symptoms of heat exhaustion (overheating) include nausea or vomiting.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
feeling sick (nausea) or being sick (vomiting)
NHS · open the source · accessed: 2026-10-14 · license [1]
- Symptoms of heat exhaustion also include a high temperature.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
a high temperature
NHS · open the source · accessed: 2026-10-14 · license [1]
- The symptoms of heat exhaustion are often the same in adults and children.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
The symptoms of heat exhaustion are often the same in adults and children.
NHS · open the source · accessed: 2026-10-14 · license [1]
- Heat exhaustion usually does not need emergency help if the body can be cooled down within 30 minutes.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
Heat exhaustion does not usually need emergency medical help if you can cool down within 30 minutes.
NHS · open the source · accessed: 2026-10-14 · license [1]
- Children are more at risk of heat exhaustion and heatstroke, so in hot weather it is worth checking how they are feeling.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
Check on children, older people and people with long-term health conditions, such as diabetes or heart problems, as they're more at risk of heat exhaustion or heatstroke.
NHS · open the source · accessed: 2026-10-14 · license [1]
ER / 112 (Poland)
Some claims: international norm
Immediate medical help needed: international norm
- Heatstroke needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
Heatstroke is a medical emergency.
NHS · open the source · accessed: 2026-10-14 · license [1]
- Hot skin without sweating is a sign of heatstroke, which needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
hot skin without sweating
NHS · open the source · accessed: 2026-10-14 · license [1]
- Confusion and restlessness are signs of heatstroke, which needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
confusion and restlessness
NHS · open the source · accessed: 2026-10-14 · license [1]
- Seizures are a sign of heatstroke, which needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
seizure (fit)
NHS · open the source · accessed: 2026-10-14 · license [1]
- Loss of consciousness is a sign of heatstroke, which needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
loss of consciousness
NHS · open the source · accessed: 2026-10-14 · license [1]
- Still feeling unwell after 30 minutes of resting in a cool place, being cooled and drinking fluids is a sign of heatstroke and needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
still being unwell after 30 minutes of resting in a cool place, being cooled and drinking fluids
NHS · open the source · accessed: 2026-10-14 · license [1]
- An ambulance is called, among other things, for heatstroke.
Source: Portal Pacjenta – show the quote
Verbatim quote from the source:
Polish original
udar cieplny
Portal Pacjenta · open the source · accessed: 2026-10-14 · license [2]
- An ambulance is also called for a very high fever with seizures or with symptoms that a given person does not usually have during a fever.
Source: Portal Pacjenta – show the quote
Verbatim quote from the source:
Polish original
bardzo wysoka gorączka z drgawkami lub objawami, które zwykle u danej osoby podczas gorączki nie występują
Portal Pacjenta · open the source · accessed: 2026-10-14 · license [2]
- Call an emergency medical team (ZRM), among other things, for loss of consciousness, seizures and persistent vomiting, especially with blood in it.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Wezwij zespół ratownictwa medycznego, jeśli ktoś w Twoim otoczeniu np. stracił przytomność, ma drgawki, zaburzenia rytmu serca, rozległe oparzenia, uporczywe wymioty – zwłaszcza z domieszką krwi, odczuwa nasiloną duszność lub ostry ból brzucha.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [3]
- Call 112 (the emergency number in Poland) or 999 (the ambulance number in Poland) when life or health is at risk.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Zadzwoń na 112 lub 999, jeśli zagrożone jest życie lub zdrowie.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [3]
See a doctor
Some claims: international norm
Urgent medical assessment needed: international norm
- Dehydration (diapers that are not very wet, sunken eyes, no tears when crying) together with a high temperature needs an urgent medical assessment.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
is dehydrated – such as nappies that are not very wet, sunken eyes, and no tears when they're crying
NHS · open the source · accessed: 2026-10-14 · license [1]
- Night and holiday health care is medical help outside the working hours of a primary care (POZ) clinic.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Nocna i świąteczna opieka zdrowotna to pomoc lekarska po godzinach pracy przychodni POZ.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [3]
- If in doubt, it is better to talk to a doctor.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Zawsze jeśli masz wątpliwości – lepiej skonsultować się z lekarzem.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [3]
international norm “International norm” next to a section heading means its claims come from a non-Polish source, because no Polish source in our registry covers this topic. When this applies to only some of the claims, the foreign ones carry the same label next to their source.
Sources
- NHS (nhs.uk, Anglia)
- https://www.nhs.uk/conditions/heat-exhaustion-heatstroke/
- https://www.nhs.uk/conditions/fever-in-children/
License: Open Government Licence v3.0. Source: NHS (nhs.uk, Anglia). Content summarized and translated by the editors; changed relative to the original. Contains public sector information licensed under the Open Government Licence v3.0. The summary is ours and is not attributed to the NHS. - Portal Pacjenta (pacjent.gov.pl)License: CC BY 3.0 PL. Source: Portal Pacjenta (pacjent.gov.pl). Content summarized and translated by the editors; changed relative to the original.
- NFZ i Akademia NFZLicense: Treści NFZ – wykorzystanie ze wskazaniem źródła, bez obrotu komercyjnego. Source: NFZ i Akademia NFZ. Content summarized and translated by the editors; changed relative to the original.